[Petronski]

Okay - I've boiled a fair amount of drinking water in my time, and I'm not aware of anything that takes boiling for an hour to kill. Anyone know the purpose of this?

Giardia takes a long time to kill, but an hour is really long.

[Pearls Before Swine]

Giardia takes a long time to kill...

And its not fun if you get it, let me tell you! And there's going to be worse in the water than giardia in that water.